All Downloads are FREE. Search and download functionalities are using the official Maven repository.

de.quantummaid.mapmaid.dynamodb.rearranging.RearrangingUnmarshaller Maven / Gradle / Ivy

There is a newer version: 0.10.19
Show newest version
/*
 * Copyright (c) 2020 Richard Hauswald - https://quantummaid.de/.
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package de.quantummaid.mapmaid.dynamodb.rearranging;

import de.quantummaid.mapmaid.mapper.marshalling.Unmarshaller;
import lombok.AccessLevel;
import lombok.RequiredArgsConstructor;

import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import static de.quantummaid.mapmaid.debug.MapMaidException.mapMaidException;

@RequiredArgsConstructor(access = AccessLevel.PRIVATE)
public final class RearrangingUnmarshaller implements Unmarshaller {
    private final List rearrangers;

    public static RearrangingUnmarshaller rearrangingUnmarshaller(final List rearrangers) {
        return new RearrangingUnmarshaller(rearrangers);
    }

    @SuppressWarnings("unchecked")
    @Override
    public Object unmarshal(final Object input) throws Exception {
        if (!(input instanceof Map)) {
            throw mapMaidException("can only unmarshall from a Map but got '" + input.getClass() + "'");
        }
        final Map map = (Map) input;
        final Map mutableMap = new LinkedHashMap<>(map);
        for (final Rearranger rearranger : rearrangers) {
            rearranger.reverse(mutableMap);
        }
        return mutableMap;
    }
}